Now about the problems.

First problem is that sometimes (5-10 times per month) this thing happens. Im writing because its getting annoying because I can't access my tray icons, language, audio and other settings from the desktop.
Second:
http://i.imgur.com/MwvfkHn.jpg
This happens once per 1-2 months but when it happens it pretty much ruins my day. Almost ALL Icons on ALL desktops go to default position and I have to rearrange them again.
Could I prevent this from happening or fix it somehow? It happened a lot of times and Its very important to me.
Beforehand, thanks!